Putting it all together

User Experience is in every form of communication.
— Dorn Byg

It is my assertion that User Experience Design is in everything that can be seen or done. Slides at a playground, epoxy on a floor, or cheese powder on a Cheetos. No matter! There has been some form of information used to make sure that the user/consumer/interactor has a positive experience with whatever it is that they are interacting with. 
I don't wish to debate the scale or involvement any UX Design may have played in anything. I only make this point because I see User Experience Design in everything that I do or have done. 
To me, all communication is (or should be) done with the intent to successfully convey an idea. If the idea that is to be shared does not make it to the recipient successfully then communication has failed.